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One cubic yard of concrete weighs around 4,000 pounds. Concrete is measured in cubic yards. Concrete is made out of sand, gravel and cement. Cement is made out of limestone, silica and alumina. Cement is a gray powder that reacts with water to harden the concrete.


Multiplying the length, width and depth, converted to yards, of the area in question provides the amount of concrete needed in cubic yards. This formula is applicable for any square or rectangular area, commonly referred to as a slab when pouring concrete.


The average price of a cubic yard of concrete is around $90. The exact price varies by location and the quality of the concrete.


Calculate the number of cubic yards of concrete by calculating the volume of the pour and adding 10 to 15 percent to ensure you have enough material. If you calculate volume in cubic inches or cubic feet, use a conversion factor to convert the volume to cubic yards.


A cubic yard of normal concrete weighs approximately 4,000 pounds, according to Cemex. This may vary based on the mix design, the amount of hydration and environmental conditions.


There are 45 80-pound bags and about 60 60-pound bags of concrete in a cubic yard. Each 80-pound bag of concrete covers about 0.6 cubic feet. There are 27 cubic feet in a cubic yard: 27/.6 = 45.


From 1982 to 2015, the cost of concrete rose fairly slowly during most years. The price of concrete varies based on demand; during the recession that began in 2008, for example, the cost of concrete dropped before rising as the recession ended.